Ostwald ripening of charged supported metal nanoparticles: Schottky model
Journal article, 2015

Due to high surface area, supported metal nanoparticles are thermodynamically prone to sintering. The experimental studies of this process exhibit sometimes transient bimodal particle size distributions. Such observations may result from the support heterogeneity. Looking retrospectively, one can also find the prediction that in the case of Ostwald ripening this feature can be related to charge of metal nano particles. In real systems, this charge is often associated with the metal support interaction and can be interpreted in the framework of the Schottky model. Using this model, the author shows that the charge redistribution cannot be behind bimodal particle size distributions. Moreover, the corresponding contribution to the driving force for Ostwald ripening is typically much smaller than the conventional one.

Catalysis

Charge transfer

Sintering

Supported metal nanoparticles

Metal-semiconductor interface

Author

Vladimir Zhdanov

Chalmers, Applied Physics, Chemical Physics

Physica E: Low-Dimensional Systems and Nanostructures

1386-9477 (ISSN)

Vol. 71 130-133

Subject Categories

Chemical Process Engineering

Nano Technology

DOI

10.1016/j.physe.2015.04.001

More information

Created

10/8/2017